There is a strong conceptual and practical appeal for building cryptographic schemes which have unconditional security meaning that they cannot be attacked by any classical or quantum computer, even with unlimited computing power. Quantum Key Distribution [1]} is a prime example of this, and a huge amount of work has been done to understand its security and perform efficient implementations. Relativistic cryptography is another proposal for achieving unconditional security that exploits the no superluminal signaling (NSS) principle. NSS states that no information carrier can travel faster than the speed of light. The interest of relativistic cryptography is that it can perform coin flipping and bit commitment protocols with unconditional security which is known to be impossible even using quantum information [2]}, [3]}, so relativistic cryptography and quantum cryptography complete each other well for protocols with unconditional security. In order to perform protocols in relativistic cryptography, there has to be some strict space-time constraints between the different agents performing the protocol but they can be done without quantum hardware. The goal of this work is to show the practicality of relativistic cryptography by presenting a new relativistic zero-knowledge protocol for \(\)  and demonstrating its feasibility in real-life conditions, on standard laptops using a standard internet connection. This is the first time a protocol for relativistic cryptography is implemented in this setting and shows these are much simpler to perform than what we could have expected.
